Patents by Inventor Phillip E. Allen

Phillip E. Allen has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Method for forming fiber-reinforced plastic articles
    Patent number: 3937781
    Abstract: Hollow, reinforced plastic articles are molded in a closed molding chamber by employing an internal expandable bag to define the inside surface of the article to be molded. A nonstretchable sleeve surrounds at least a portion of the bag so that, when the bag is inflated during the molding operation, the sleeve accurately establishes the wall thickness of the article to be molded.
    Type: Grant
    Filed: June 15, 1973
    Date of Patent: February 10, 1976
    Assignee: Structural Fibers, Inc.
    Inventor: Phillip E. Allen